Screw driver



' July 15 1924. 1,501,222

s. c. LAMP SCREW DRI VER Filed May 18. 1923 2 Sheets-Sheet l INVENTOR am @64 2 MM q WITNESS:

ATTORNEY S. C. LAMP SCREW DRIVER Filed May 18, 1923 2 Sheets-Sheet. 2

WITNESS: ATTORNEY Patented July 15, 1924. i

ED STATES SAMPSON CISCO LAMP, 0F DAWES, WEST VIRGINIA.

SCREW DRIVER.

Application filed May 18,

To all whom it may concern.

Be it known that I, SAMPSON C. LAMP, a citizen of the United States, residin at Dawes, in the county of Kanawha and tate of West Virginia, have invented new and useful Improvements in Screw Drivers, of which the following is a specification.

particular application to a screw driver, the object being to provide a tool of this character including a movable section normally disposed centrally within the tool, but capable of being projected therefrom and held in position for use when desired, the movable section converting the tool into a small screw driver when projected to a position for use, while a similar tool of larger dimensions is provided when the movable section is in normal position.

The nature and advantages of the invention will be better understood when the following detailed description is read in connection with the accompanying drawings,

- the invention residing in the construction,

combination and arrangement of parts as claimed. I

In the drawings forming part of this application, like numerals of reference indicate similar parts in the several views, and wherein:

Figure 1 is a view in elevation of the tool forming the subject matter of this invention.

Figure 2 is a longitudinal sectional view therethrough.

Figure 3 is a view of the tool with the movable section or small screw driver extended for use.

Figure 4 is a transverse sectional view taken on the line 4-4 of Figure 1.

Figure 5 is a similar viewtaken on the line 5-5 of Figure 3.

Figure 6 is a detail view of the movable section or small screw driver.

Referring to the drawings in detail, 10 indicates the handle of a screw driver, which together with the shank 11 is of hollow formation for a purpose to be hereinafter described. In addition to this fact, the handle 10 is provided at opposite sides with bayonet slots 12. The working end of the tool is cut away as at 13. to receive the head or working end 14 of what I term a movable section, consequently a small screw driver as compared to the size of the tool proper is provided. The shank 15 of this mov- 1923. Serial No. 639,960.

able section, or small screw driver slides centrally through the tool proper and is normally maintained within the latter by means of a spring 16. A connecting pin 17 is connected with the shank of the small screw driver and this pin 17 projects through the bayonet slots above referred This invention relates to tools and has to As shown in Figure 2, the small screw driver is normally arranged with the head or working end thereof positioned in the cutaway portion of the working end of the main shank, and consequently a screw driver of a large size is provided for. In this position of parts, the pin 17 is arranged in the corresponding long branches of the bayonet slots. Now, when use of a small screw driver is desired it is only necessary to move the cross pin 17 longitudinally of the long branches of said slots, which projects the small screw driver to a working position beyond the end of the shank 11, and by subsequently turning the pin 17 into the short branches of said slot, the small screw driver is held in working position against the tension of the spring secured to the same. The small screw driver can be easily returned to normal position by turning the pin 17 in a reverse direction and arranging in the long branches of the slots.

While it is believed that from the foregoing description, the nature and advantages of the invention will be readily apparent, I desire to have it understood that I do not limit myself to what is herein shown and described and that such changes may be resorted to when desired as fall within the scope of what is claimed.

Having thus described the invention, 1

claim:

A screw driver having a hollow handle and a hollow shank providing the main therewith, and said auxiliary screw driver adapted to be moved into active position against the tension of said spring and dispose said pin in the short arms of the L 5 shaped slots to prevent casual turning movement of the auxiliary screw driver relative to the handle and to dispose the auxiliary screw driver beyond the working end of the main screw driver and at an angle relative thereto.

In testimony whereof I afiix my signature. 

